Jet device



May 19, 1931.

H. D. YoDER V 118065,187

JET DEVICE Filed July 20. 1929 -V'EJT/DF foward yoce?? Patented May 19', 1931 Para HOWARD D. Yonne, or DETROIT. MICHIGAN, Assiettes. To PENBEBTHY iNJEcToR CoM- iatale? E FICEt PANY, OF DETROIT, T'TICHGAN, A COEPQRATON-OF DELAWARE JET DEVICE Application filed July 20,

-This invention relates to jet action and particularly to Aj et actions of the automatic overflow typeV wherein a jet is automatically established after interruption of water supply during the working cycles of the et.

Thel automatic reestablishing feature resides in a provision of large relief spaces or openings so that before a mixture of steam and water has reached proper proportions .10 the improperly mixed jet can escape through the overflow valve before the jet is established in its normal or working proportions. The steam and water'flow alternately-into the jet until the jet itself is established. Spillage 15 is allowed during the formation of the jet and is stopped when the jet is formed,` that is,

when the steam and water have reached proper proportions for the working range of the structure. The relief space is thereby re- 20 duced to a minimum for the working range of the device. v

The invention contemplates a delivery tube including several slidable sections one of which is' responsive to the pressure created f k of the device and includingslidable sections which when moved responsive to the pressure in the delivery chamber constitute the delivery tube of the jet structure.

Spill holes maybe provided in the movable sections for providing additional relief space for the escape of fluid before the flow is vestablished in its normal or working proportions. y

The large relief spaces are required for automatic starting but are noteflicient after the jet has been established to allow the same to operate at maximum efficiency. Internal pressure in the device causes discharge of some water which may be through the spill holes 4and which eventually escapes through this chamber.

1929. Y serial No. 379,599.

the overflowV opening, such overflow. ladmitting some air to the combining chamber thereby affecting' thefvacuum established in It is therefore desirable to provide means for reducing the large starting area or Zone as the jet .is formed orestablished to allow operation of the jet through a wide range.

An object of the invention is to provide a jet or jet action inwhich large' `spillage areas are provided for starting and vwhich are eliminated or reduced to working range after the jet is established. f

Another object of the invention is to'provide a jet action wherein large spillage areas are created atthe outset and eliminated b the action of the jet itself. A further object of the invention is to pro vide a j et action wherein large starting spaces or areas are provided and which spaces are re duced after thejet is established by building up pressure in the delivery chamber, which pressure serves to move certain parts of the structure to reduce the starting spaces.

Another and still. further object of the inmatic overflow type/arranged to automatical- Y ly reestablish the jet after interruption of water supply during the working cycle of the jet and which jet action iseconomical to man# ufa'cture and efficient in operation overa Wide range.y

The above, other andrfurther objects of the invention will be apparent from the following description, accompanying drawings and appended claims.

An embodiment of the invention isillusi trated in the accompanying drawings and the views thereof are 'ais follows:

` present invention and showing the delivery 4appended tube as constituting two slidable sections as the same appear when the jet is inoperative or at the time the action has started and before the vjet is established.

Figure 2 is a fragmental sectional view of aportion of theapparatus of Figure 1 showing the delivery tube sections as the same appear in operation when a. jet is established.

The invention is illustrated herein in connection with an injector and shows the delivery tube as consisting of two sliding sections. It is to be understood at the outset thatthe invention is not limitedito an injector but is susceptible of use in any situation .wherein jet action is utilized'. It is further to be understood that the delivery tube is not limited to two sliding sectionsbut may be -made tup. of as manysliding sections as conditions warrant.

The invention will, for the .sake of brevity,

be hereinafter referred to as an injector, however, suchterm 1s used generically and not by way of limitation and when so used is to be .understood-as contemplating jet .action of any kind whatsoever .and therefore` its use in the claims should beconstrued accord- 1 Theinjector, as illustrated,1includes .a flongitudinally sectioned casing 1 each section of which is formed with cooperating partitions 2, 3, 4, l5 and .end walls 6 and 7, deiningrespectively a water .and steam'cliamber A, a combining chamber B,fsup"plemental combining Achambers C and D, a delivery chamber E .and an overflow chamber F. The sections of Vthe casing 1 are provided with co-acting Y.flanges 'bolted or otherwise secured together.

The casting is provided with a 'steam inlet orifice 8, a water inlet orifice 9, a boiler dischargeoutlet 10 and an 'overflow .outlet 11.

' Aasteam inletnozzle `12 is secured in the steam inlet orifice .8 in any suitable manner and projects'into the water and steam chamber A. Anipple 13 is connectedby means of a collar 14 to the steam inlet end ofthe apparatus for connection to al steam supply line. j A nipple 15 is shown as secured by a collar 16 tothe water inlet 9. u nipple .17 is connected by means of a suitable connectorv18 to the boiler outlet 10, while the overflow outlet 11 vis connected by means not shown to a -waste pipe. v

Y 'The partition 2 has an axial openingv `19 in which .is secured a nozzle .2O which has a tapered bore therethrough converging from the rentranceto the discharge end o-f Athe nozzle. ',Apacking ringor gasket 20a is positioned between :the walls of opening 19 andthe outer walls of nozzle 2O to provide a liquid-tight joint therebetween.

` 'The bore 'of thesteam nozzle 12isshown as cylindrical at 21 'and as divergingat22.

The partition 3 likewise has an axially disposed opening 23. through the same. The partitions 4 and 5 also have axial openings 24 and 25 in the same.

A nozzle 26 is arranged for sliding'move-A Vment in the opening 23of the partition 3 and is provided witha shoulder 27 to limit movement thereof in one direction. The diameter of the nozzle 26 is slightly smaller than the diameter of the opening v23 through the partition 3. It is, of course, presumed that the shape of the outer surface of the nozzle 26 and the corresponding shape of the opening 23 in the partition 3may be circular or of any other shape and therefore the seof the term diameter is Vmeant .to include .size

- where these shapesare other than circular.

lindrical .portion 31 and a ldiverginrg delivery end .portion 32. The nozzle also has an outer Acircumferential shoulder 33 provided witha plurality of spillage passages 34 communicating with the cylindrical'bore 31 kofthe nozzle.

The outer ydiameter of the end of the nozzle `29 where the same .passes through the aperture l24 in .thepartition 4 is vslightly smaller than the diameter of 'said aperture. Likewise the diameter of the .other end of the nozzle 29 is .smaller than ztliediameter ofthe aperture 25 lin the partition 5. Shoulders 35v are provided on the nozzle29 for .resting against theupper surface of the partition wall 5.

It might be said here that the Aillustrated form of the invention is shown in connection with a vertically acting injector, but, of

course, the invention is susceptible of use with la Ahorizontally or otherwise disposed device.

Reference to upper and lower in this specilication should Vbe construed in accordance withv the drawings and Aconstrued as being merely illustrative of the illustrated form of the invention and not as limitations ofthe same. 'u

The overflow chamber F is normally closed by a valve 36 whichis carried on an arm'37 pivoted at 38 to the casting so that the valve '36 may swing away from itsse'at-to allow spillage into the overflow connection 111-for disposal. The casing is provided witha plug 39 whereby access may =behad .to 4the yoverflow valve 36. A .plug 40 'closes the =lowerendof the deliverychamberE and is utilizedV for purposes well understood. The .plug 40 is hollow-'so as to enlarge the 'capacity of :the

[delivery chamber-.TE .asthe jet .isz/forming .and "P also as the jet operates in its working cycle. The normal position of the sliding nozzles 26 and 29, that is, when the device is inoperative or at the time the jet action is started, is as illustrated in Figure 1, such arrange ment providing gaps G and H.

The operation of the illustrated form of the invention is as follows:

The arrangement of parts shown in Figure 1 shows the position of the same when steam is flowing from the nozzle 12 and exhausting through the gap H to the overflow chamber F. The passage of the steam draws with it water and Jthe steam and the water for a time are uncombined in the proper proportions for forming the jet. Surplus of water and steam pass from the gaps G and H into the overflow chamber for discharge and any eX- cess steam and water delivered to the nozzle 29 will to some extent pass outwardly through the opening 3-1 and upwardly through the space between the aperture 24 in the partition 4 and the upper end of the nozzle 29 to the overflow chamber F. After the `flow has become better established steam ceases to flow from the nozzle 2O and the water from the water supply 15 and the condensed steam now pass from the nozzle 12 through the nozzle 20 through the sections 26 and 29 into the delivery chamber where pressure is built up, lifting the nozzle 29 to the position .shown in Figure 2. The nozzle 29 will as soon as it has been lifted a distance equal to the gap G contact the nozzle 26 and in turn lift it, thus reducing the gap H to that shown in Figure 2 which is in effect a mere normal clearance gap between the nozzle 20 and the nozzle 26 which now becomes the upper end of the delivery tube. A jet is formed or established by this time and the nozzles 26 and 29 form the delivery tube and remain in this position until the water supply is for some reason interrupted. It will be observed that by the action just described the gap G has disappeared entirely and that the gap H has been reduced to a mere normal clearance gap. Furthermore, the engagement of the shoulder 33 with the underside of the partition l closes escape to the overflow chamber F from the spill holes 34. Y Y

It will be observed that by the operation just desscribed relief spaces are provided at the gaps G and H and also through the spill holes 34 for spillage action while the jet is forming and that when the jet is formed or established the gap Gr is eliminated as is also discharge from the spillage holes 34 while the gap H is reduced to a nominal operative range.

The bore of the nozzle 26 conforms to the inclination of the bore 30 of the nozzle 29 so that when the nozzles 26 and 29 are in endwise contact as illustrated in Figure 2 the convergence of the bore 28 of the nozzle 26 the nozzlev 29 will be conl of the bore 28 of the nozzle 26, thereby lengthening the lite of usefulness of the device. Y

The invention has been describe-d herein more or less precisely yet itis to be'underfstood that the saine is not to be limited thereby as it is understood that changes may be made' in the arrangement Aand proportion of 'partsand that equivalents may be substituted without departing'from vthe vspirit i and scope Vof the invention.

rl"lie invention is claimed as follows 1. A jet device or injector ofthe automatic open overflow type having a plurality livery tube, said sections deining gaps between tlie same when separated, said gaps providing spillage areas, one of said sections being respon-sive to the pressure created by the established jet 'for moving said tube against another of said sections for varying the gaps. l

2. A jet device or injector having a plu-r rality of separate relatively slidable axially spaced nozzle sections constituting a delivery tube, said separated nozzles forming gaps between the same, one of said sections being movable responsive to the pressure created by the established jet, said one section moving another section to vary the gap between it and an adjacent section.

3. A jet device or injector including a pluralityr of axially spaced nozzle sections, some of said sections being axially movable, said spaced sections forming gaps between the same, said injector having an overflow chainber in communication with said gaps, one of said nozzle sections being movable in response to the pressure created by the established jet to close the gap between it and the next section and move said next section to vary the gap between it and the next adjacent section.

Ll. A jet device. including a plurality oi axially movable sections forining'a delivery tube, a delivery chamber into which one of said movable sections projects, said movable sections being moved axially away from said delivery chamber by pressure created therein by jet action for reducing the spaces between said several movable sections.

5. A jet device or injector of the automatic open overflow type comprising a casing, a fixed combining nozzle in said casing, a plurality of aligned nozzles slidably mounted in said casing and constituting a delivery tube, all of said nozzles being spaced apart to provide spillage gaps therebetween lwhen the injector is starting, compartments in said cas- .of sliding nozzle sections constituting a de- Y' Ving into which said spillage gaps discharge, another compartment in said easing surrounding the outermost of said delivery nozzles, said last named nozzle-having spill openings leading to .said surrounding compart` ment, an overflow chamber in communication with all of said compartments, said* outermost delivery nozzle being movable under the pressure created by the established "1'0 jet when the linjector is started to close the i gap between it and the neXt adjacent nozzle and move said next nozzle toward said combining nozzle to decrease .the spillage gap therebetween and means on said outermost delivery nozzle for cutting oli communication between the overiiow chamber and the compartment surrounding said outermost delivery nozzle when said nozzle is Amoved to- Y ward combining tube.

' L20 In testimony whereof I have hereunto subscribed my name at Detroit, Wayne County,

Michigan. v v

HOVARD D. YODER. 

